content: /* Copyright (C) 2016-2018 Alibaba Group Holding Limited
  
  Licensed under the Apache License, Version 2.0 (the "License");
  you may not use this file except in compliance with the License.
  You may obtain a copy of the License at
  
      http://www.apache.org/licenses/LICENSE-2.0
  
  Unless required by applicable law or agreed to in writing, software
  distributed under the License is distributed on an "AS IS" BASIS,
  WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
  See the License for the specific language governing permissions and
  limitations under the License.
  ==============================================================================*/
  
  /*
   * Protocol Buffers - Google's data interchange format
   * Copyright 2014 Google Inc.  All rights reserved.
   * https://developers.google.com/protocol-buffers/
   *
   * Redistribution and use in source and binary forms, with or without
   * modification, are permitted provided that the following conditions are
   * met:
   *
   *     * Redistributions of source code must retain the above copyright
   * notice, this list of conditions and the following disclaimer.
   *     * Redistributions in binary form must reproduce the above
   * copyright notice, this list of conditions and the following disclaimer
   * in the documentation and/or other materials provided with the
   * distribution.
   *     * Neither the name of Google Inc. nor the names of its
   * contributors may be used to endorse or promote products derived from
   * this software without specific prior written permission.
   *
   * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
   * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
   * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
   * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
   * OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
   * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
   * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
   * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
   * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
   * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
   * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
   */
  
  package com.google.protobuf.jruby;
  
  import org.jruby.*;
  import org.jruby.anno.JRubyClass;
  import org.jruby.anno.JRubyMethod;
  import org.jruby.runtime.*;
  import org.jruby.runtime.builtin.IRubyObject;
  
  @JRubyClass(name = "Builder")
  public class RubyBuilder extends RubyObject {
      public static void createRubyBuilder(Ruby runtime) {
          RubyModule protobuf = runtime.getClassFromPath("Google::Protobuf");
          RubyClass cBuilder = protobuf.defineClassUnder("Builder", runtime.getObject(), new ObjectAllocator() {
              @Override
              public IRubyObject allocate(Ruby runtime, RubyClass klazz) {
                  return new RubyBuilder(runtime, klazz);
              }
          });
          cBuilder.defineAnnotatedMethods(RubyBuilder.class);
      }
  
      public RubyBuilder(Ruby runtime, RubyClass metaClass) {
          super(runtime, metaClass);
          this.cDescriptor = (RubyClass) runtime.getClassFromPath("Google::Protobuf::Descriptor");
          this.cEnumDescriptor = (RubyClass) runtime.getClassFromPath("Google::Protobuf::EnumDescriptor");
          this.cMessageBuilderContext = (RubyClass) runtime.getClassFromPath("Google::Protobuf::MessageBuilderContext");
          this.cEnumBuilderContext = (RubyClass) runtime.getClassFromPath("Google::Protobuf::EnumBuilderContext");
      }
  
      /*
       * call-seq:
       *     Builder.new => builder
       *
       * Creates a new Builder. A Builder can accumulate a set of new message and enum
       * descriptors and atomically register them into a pool in a way that allows for
       * (co)recursive type references.
       */
      @JRubyMethod
      public IRubyObject initialize(ThreadContext context) {
          Ruby runtime = context.runtime;
          this.pendingList = runtime.newArray();
          return this;
      }
  
      /*
       * call-seq:
       *     Builder.add_message(name, &block)
       *
       * Creates a new, empty descriptor with the given name, and invokes the block in
       * the context of a MessageBuilderContext on that descriptor. The block can then
       * call, e.g., MessageBuilderContext#optional and MessageBuilderContext#repeated
       * methods to define the message fields.
       *
       * This is the recommended, idiomatic way to build message definitions.
       */
      @JRubyMethod(name = "add_message")
      public IRubyObject addMessage(ThreadContext context, IRubyObject name, Block block) {
          RubyDescriptor msgdef = (RubyDescriptor) cDescriptor.newInstance(context, Block.NULL_BLOCK);
          IRubyObject ctx = cMessageBuilderContext.newInstance(context, msgdef, this, Block.NULL_BLOCK);
          msgdef.setName(context, name);
          if (block.isGiven()) {
              if (block.arity() == Arity.ONE_ARGUMENT) {
                  block.yield(context, ctx);
              } else {
                  Binding binding = block.getBinding();
                  binding.setSelf(ctx);
                  block.yieldSpecific(context);
              }
          }
          this.pendingList.add(msgdef);
          return context.runtime.getNil();
      }
  
      /*
       * call-seq:
       *     Builder.add_enum(name, &block)
       *
       * Creates a new, empty enum descriptor with the given name, and invokes the block in
       * the context of an EnumBuilderContext on that descriptor. The block can then
       * call EnumBuilderContext#add_value to define the enum values.
       *
       * This is the recommended, idiomatic way to build enum definitions.
       */
      @JRubyMethod(name = "add_enum")
      public IRubyObject addEnum(ThreadContext context, IRubyObject name, Block block) {
          RubyEnumDescriptor enumDef = (RubyEnumDescriptor) cEnumDescriptor.newInstance(context, Block.NULL_BLOCK);
          IRubyObject ctx = cEnumBuilderContext.newInstance(context, enumDef, Block.NULL_BLOCK);
          enumDef.setName(context, name);
  
          if (block.isGiven()) {
              if (block.arity() == Arity.ONE_ARGUMENT) {
                  block.yield(context, ctx);
              } else {
                  Binding binding = block.getBinding();
                  binding.setSelf(ctx);
                  block.yieldSpecific(context);
              }
          }
  
          this.pendingList.add(enumDef);
          return context.runtime.getNil();
      }
  
      /*
       * call-seq:
       *     Builder.finalize_to_pool(pool)
       *
       * Adds all accumulated message and enum descriptors created in this builder
       * context to the given pool. The operation occurs atomically, and all
       * descriptors can refer to each other (including in cycles). This is the only
       * way to build (co)recursive message definitions.
       *
       * This method is usually called automatically by DescriptorPool#build after it
       * invokes the given user block in the context of the builder. The user should
       * not normally need to call this manually because a Builder is not normally
       * created manually.
       */
      @JRubyMethod(name = "finalize_to_pool")
      public IRubyObject finalizeToPool(ThreadContext context, IRubyObject rbPool) {
          RubyDescriptorPool pool = (RubyDescriptorPool) rbPool;
          for (int i = 0; i < this.pendingList.size(); i++) {
              IRubyObject defRb = this.pendingList.entry(i);
              if (defRb instanceof RubyDescriptor) {
                  pool.addToSymtab(context, (RubyDescriptor) defRb);
              } else {
                  pool.addToSymtab(context, (RubyEnumDescriptor) defRb);
              }
          }
          this.pendingList = context.runtime.newArray();
          return context.runtime.getNil();
      }
  
      protected RubyArray pendingList;
      private RubyClass cDescriptor, cEnumDescriptor, cMessageBuilderContext, cEnumBuilderContext;
  }
  